eSeasongear SALT-3050 Waterproof IP65 Digital Salt Salinity Temperature Meter Tester *** Works ONLY for Salt Water Pool and Koi Fish Pond Salt level testing! *** Will NOT work for Sea/Marine/Salt Water Fish Tank Salt level testing! *** Will NOT work for Food salt level testing! *** Will NOT work for any other application! *** Salt Range: 0-5000ppm or 0-5.0 ppt; Temperature Range: 0-55 °C or 32-130 °F *** Waterproof Rating: IP65; Do not drop the meter into water since it is not rated to the IP-67. *** The SALT-3050 is precalibrated at 3000ppm salt for pool and pond testing. *** This meter is better than the KoiMedic Koi Medic Salt Meter – Electronic Pond Water Salt Level Tester. *** The 3000ppm calibration solution is available if needed for recalibration. *** eSeasongear is a registered trademark of All Water Care, Inc.